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Enable 'xp_cmdshell' SQL Server
...ncedOptions int
declare @prevXpCmdshell int
select @prevAdvancedOptions = cast(value_in_use as int) from sys.configurations where name = 'show advanced options'
select @prevXpCmdshell = cast(value_in_use as int) from sys.configurations where name = 'xp_cmdshell'
if (@prevAdvancedOptions = 0)
begin...
How to avoid “cannot load such file — utils/popen” from homebrew on OSX
...al
If it still doesn't work, use these steps inside a terminal session and everything will be fine:
cd /usr/local/Library/Homebrew
git reset --hard
git clean -df
brew update
This may be because homebrew is not updated.
...
Why should I care that Java doesn't have reified generics?
...
Type safety comes to mind. Downcasting to a parametrized type will always be unsafe without reified generics:
List<String> myFriends = new ArrayList();
myFriends.add("Alice");
getSession().put("friends", myFriends);
// later, elsewhere
List<Frien...
How do I split a string so I can access item x?
...
)
returns table
AS
return (
with tokens(p, a, b) AS (
select
cast(1 as bigint),
cast(1 as bigint),
charindex(@separator, @str)
union all
select
p + 1,
b + 1,
charindex(@separator, @str, b + 1)
from tokens
where b > 0
)
sele...
sed command with -i option failing on Mac, but works on Linux
I've successfully used the following sed command to search/replace text in Linux:
12 Answers
...
psql: could not connect to server: No such file or directory (Mac OS X)
...master has exited.).
SOLUTION: This fixed the issue--I deleted this file, and then everything worked!
/usr/local/var/postgres/postmaster.pid
--
and here is how I figured out why this needed to be deleted.
I used the following command to see if there were any PG processes running. for me ther...
Mercurial for Beginners: The Definitive Practical Guide
....hgignore
There are two syntax options available for file matching, glob and regexp. glob is unix-like filename expansion and regexp is regular expressions. You activate each by adding syntax: glob or syntax: regexp on a line by itself. All lines following that will use that syntax, until the next...
How can I start PostgreSQL server on Mac OS X?
I had forgotten to run the initdb command.
33 Answers
33
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Why can I pass 1 as a short, but not the int variable i?
...soft.com/en-us/library/ybs77ex4(v=vs.71).aspx
As this page says, implicit casts from a bigger data type to short are only allowed for literals. The compiler can tell when a literal is out of range, but not otherwise, so it needs reassurance that you've avoided an out-of-range error in your program ...
How to get the number of Characters in a String?
...en adds in the comments:
Actually you can do len() over runes by just type casting.
len([]rune("世界")) will print 2. At leats in Go 1.3.
And with CL 108985 (May 2018, for Go 1.11), len([]rune(string)) is now optimized. (Fixes issue 24923)
The compiler detects len([]rune(string)) pattern automati...